MPPT (Maximum power point tracker)

MPPT (Maximum power point tracking): It is an algorithm included in the charge controller circuit to extract maximum power from the PV module under certain conditions.

Maximum power point is the point obtained from the characteristics corresponds to a particular voltage & current of the PV module where the maximum power can be produced. However, the Power point tracked is variable as the PV module for the power generation depends on the sunlight (irradiance), Cell temperature. The MPP tracker functionality will remain same & works better, proves effective during the shading, winter seasons.

The above characteristics are of a typical 180W PV module (Under STC conditions), and the maximum power point varies with Irradiance (W/Sq. m), Operating Temperature, and Atmosphere which are termed as STC conditions.

Working of MPPT:

MPPT checks output of PV module, compares it to battery (off grid) voltage then fixes what is the best power that PV module can produce to charge the battery and converts it to the best voltage to get maximum current into battery (it is the no. of amps of current into the battery that counts). It can also supply power to a DC load, which is connected directly to the battery.

The output of MPPT tracker is connected to the DC to DC converter. Normally  the DC-DC converter takes input from the solar panels, change it to high frequency AC using a transformer(usually in the 20-80 kHz range), and convert it back down to a different DC voltage as guided by the MPPT controller, so as to have a constant fixed voltage for the inverter.

The process of this DC-DC conversion is to have the control on the voltage which feeds the inverter (ON-grid) (i.e., to buck or boost the voltage based on the input from the MPPT controller).

Figure showing internal functioning of an MPPT controller

Efficiency:  Modern MPPT's are around 93-97% efficient in the conversion. We mostly get a 20% to 45% power gain in winter and 10% to 15% in summer. Actual gain can vary widely depending weather, temperature, battery state of charge, and other factors.

MPPT works effectively during cloudy weather, winter seasons & in deep battery discharge conditions.

Steps to consider an MPPT charge controller:

 Find out the battery voltage (Vb) & Watt-peak of the PV module, using this find out the charging current i.e., ( Wp/Vb )= I_c and taking safety factor 1.2(NEC requirement) then calculate I=I_c*1.2 and Choose this current level  charge controller.

Find the panel output voltage (Vmp) and check it weather it is in charge controller’s MPPT operating voltage range or not.

Finally the Voc (open circuit voltage) has to meet the Voc of the charge controller.

Important parameters:

Input:

Max. DC input voltage: Maximum input voltage that the controller is rated.

Rated input power: It is the maximum power that an MPPT is designed to operate effectively.

Maximum input current: Maximum input current that can be taken by the tracker to put the maximum power at its output terminals.

Output:

Peak efficiency: It is the maximum possible efficiency (output to input ratio) that can be obtained by the MPP tracker.

Self power consumption: Power consumed by the circuit during its functioning (maximum power point tracking).

MPPT voltage range: Range of voltage for which the maximum power can be extracted from the PV module/string/system.

Max. Voltage (Voc):  It is the maximum voltage that an MPPT circuit can withstand.

Max. Charging current: Similarly, the maximum current that can be allowed to the MPPT system during its function.

Rated load current: Maximum current that can be drawn by the load through the MPPT controller.

Operating  Temperature: Operating temperature levels

Temperature degradation (mV/ ^o C): Drop in the voltage due to the rise of temperature.

Protection:

Input/ output over current protection: Protection against short circuit/ground faults whenever the faults occur.

Reverse current: This feature includes the protection against the current flowing in reverse direction i.e., from the battery to the PV panels in off-grid and from the grid to the panels in on-grid system.

Lightening/Surge current: Protection against the surges i.e., bypassing the huge currents during surges in order to safeguard the controller and the system.

Datasheet:

The following link directs to the technical data sheet of an MPPT controller.

http://www.morningstarcorp.com/wp-content/uploads/2014/02/SSMPPT_ENG10_1111.pdf

Manufacturers list:

The following list comprises of some of the well known Indian MPPT controller manufacturers.

Name of the company		Address
Protonics Systems India Private Limited		C- 45, Sector- 81, Phase- 2 Noida - 201305, Uttar Pradesh, India
Kavita Solar Energy Private Limited		No. 231, New Defence Colony, Near Railway Station Railway Road, Muradnagar Ghaziabad - 201206, Uttar Pradesh, India
SU-KAM POWER SYSTEMS LTD.		Plot No. 54, Udyog Vihar,Phase VI, Sector-37,Gurgaon - 122001, Haryana, India
Cosmic Micro Systems Private Limited		No. 23, 2nd A Cross, J. C. Nagar, Mahalakshmipura Layout, Bengaluru - 560086, Karnataka, India
ARVI Systems & Controls Pvt. Ltd		80/A2, Industrial Suburb, Yeshwanthpur, Bangalore 560 022, Karnataka, India, Email: enquiry@arviups.com
Enertech		S. No. 399/1-2, Bhare,P.O. Ghotawade,Near Pirangut, Taluka -Mulshi, Dist. Pune – 412115
SSG Power Pvt Ltd.,		174-B, Lakshmiyapuram, PACR Road, Rajapalayam - 626117, Virudhunagar District, Tamilnadu. Email :  info@ssgpower.co.in
Quantum Power Conversions (P) Ltd,		B37/2,B37/3, ITI Industrial Estate, Mahadevapura PO, Bangalore KA, India – 560048 email: sales@qpcpower.com
Jeevaditya Solar Power Pvt Ltd		A-23, 2nd Main Road, Ranganathan Nagar, Opposite To Bharat University, Selaiyur Chennai - 600073, Tamil Nadu, India
Power max energies pvt ltd.		202, Matoshree, Mithagar Road, Mulund East Mumbai - 421201, Maharashtra, India
Star Automations		10, Manuneedhi Chozhan Salai, Near GST Road, Urappakkam, Kanchipuram District Chennai - 603210, Tamil Nadu, India
Ruchi Telecom Pvt. Ltd.		F-81, Khanpur Extension, New Delhi - 110062, Delhi, India
Vitronics Controls Private Limited		S. No. 58/4/4/2, Gokul Nagar, Behind Jain Temple, Katraj-Kondhwa Road, Kondhwa BK, Landmark Opposite Shiv Parvati Mangal Karyalaya, Pune - 411048, Maharashtra, India
Soyo Systems		Plot No. M- 91, M. I. D. C. Area, Near Godavari Engineering Collage Jalgaon - 425003, Maharashtra, India
Fulfill Electric Corporation, Coimbatore		No. 13, Electrical & Electronic Industrial Estate, Near Co India- CMTR, Avinashi Road, Civil Aerodrome Post, Coimbatore - 641014, Tamil Nadu, India
Senratech		No. 502-A, Golden Complex, Avinashi Road Tiruppur - 641602, Tamil Nadu, India
Advanced Solar Power Systems		No. 844, Sector- 13, Vasundhara, Near Maharaja Agarsain Public School,Ghaziabad - 201012, Uttar Pradesh, India
Green Solar Company		No. 369, SAK Complex, Palladam Road Tiruppur - 641604, Tamil Nadu, India
Quantum Power Conversions Pvt. Ltd.		B 37/2 & 3, 1 & 2nd Floor, ITI Industrial Estate, Mahadevapura Whitefield Road Bengaluru - 560048, Karnataka, India
Sunflare Solar Private Limited		Plot No. 6/19, 2nd Floor, Kattori Mill, G.T. Road, Mohan Nagar, Delhi NCR Ghaziabad - 201007, Uttar Pradesh, India
Blue Chip Energy Solutions Pvt. Ltd.		E-57, Ground Floor, Chattarpur Extension New Delhi - 110074, Delhi, India
Manak engineering services		B- 46, Flatted Factory Complex, Capt. Gaur Marg, Near Okhla Sabzi Mandi, Phase- 3, Okhla, New Delhi - 110020, Delhi, India
Xpanz Energy Solutions LLP		314, JOP Plaza, 3rd Floor, Sector-18 Noida - 201301, Uttar Pradesh, India
Navyug Power Infra Private Limited		No. 1024 SF, Shakti Khand 4, Near Aman Plaza, Indrapuram, Ghaziabad - 201010, Uttar Pradesh, India
Windoi Energy Pvt. Ltd.		6, Rani Jhansi Road, Near Jhandewalan Mandir New Delhi - 110055, Delhi, India
Sds Fabricaters		No. 1/918, 5th Street, Venkadeshwara Nagar, Perungudi, Chennai - 600096, Tamil Nadu, India
Pearlescent Green(a Branch Of Pearlescent Electrical Pvt. Ltd.)		Level- 5, SB Tower-1, Film City, Sector-16 A Noida - 201301, Uttar Pradesh, India
Setfusion		No. 50/1, Ground Floor, 8th Main, Mathikere Bengaluru - 560054, Karnataka, India
Apna Global Industries Pvt. Ltd.		B-11 Sujan Vihar Swej Farm Nandpuri 22 Godam Jaipur - 302019, Rajasthan, India
R S Enterprises		No. 5/575, MPN Towers, 1st Floor, Velachery Tambaram Main Road, Opposite Canara Bank, Upstairs Sai Saravana Furniture Chennai - 600100, Tamil Nadu, India
Anona Tech Solutions		2B, Mahatma Gandhi Road, Kamaraj Nagar, Avarampalayam, Coimbatore - 641006, Tamil Nadu, India
Matrix International		No. 140, Gokul Dham Colony, Near Jalalpur, Muradnagar, Delhi- 201206, India
N J Corporation (n J Electricals & Electronics)		Plot No. 11, Champa Nagar, Main Market, Gurjar Ki Thadi, Mansarovar , Jaipur - 302019, Rajasthan, India
Kshitiz Solar Energy Pvt. Ltd.		A-4, 1st Floor, F.I.E. Patparganj Industrial Area, Delhi- 110092, India
Galaxy Engineering systems		No. 5- 6, Milan Complex, Opposite PNB, MG Road, Sukhrali, Gurgaon - 122001, Haryana, India
Omni power systems		No. 604, Sammnwar House, Opp. RTO, Behind Giripeth Post Office, Giripeth, Nagpur - 440010, Maharashtra, India
Lakshmi Electronics		No. 28, Navy Nagar, 5th Cross East, Meena Estate, Coimbatore - 641028, Tamil Nadu, India
Phoebus Energie		Sector10B, Vasundhara Ghaziabad - 201012, Uttar Pradesh, India

Note: The information(Manufacturers list) mentioned above may vary, and we are not responsible for any changes.

However, the source for the Manufacturers list is indiamart.com

CHARGE CONTROLLER

Charge controller/ charge regulator: Basically it limits the rate of electric current which is added to or drawn from rechargeable electric batteries. It prevents overcharging and may protect against over voltage, as over voltage instances can reduce the battery performance/ lifespan, and may pose a safety risk. It also prevents completely draining ("deep discharging") a battery, performs controlled discharges, depending on the battery technology, to protect its life. 

The terms "charge controller" or "charge regulator" may refer to either a stand-alone device, or to control circuitry integrated within a battery pack, battery-powered device, or battery charger.

 In solar applications:

A charge controller is basically a voltage and/or current regulator to keep batteries from overcharging. It regulates the voltage and current coming from the solar panels going to the battery.

 Most of the 12 volt panels outputs 16 to 20 volts, so if there is no regulation the batteries will be damaged from overcharging. Most of the 12V batteries need around 14 to 14.5 volts to get fully charged.

The deep-cycle batteries used in renewable energy systems are designed to be discharged by about 80 percent. If they are discharged 100 percent, they are immediately damaged.

The only way to prevent over discharge when all else fails, is to disconnect loads (appliances, lights, etc.), and then to reconnect them only when the voltage has recovered due to some other means of substantial charging. When over discharge is approaching, a 12 volt battery drops below 11 volts (a 24 V battery drops below 22 V). A low voltage disconnect circuit will disconnect loads at that set point. It will reconnect the loads only when the battery voltage has substantially recovered due to the accumulation of some charge. A typical LVD reset point is 13 volts (26 V on a 24 V system).

Charge controller connections

Charge controller types:

Simple 1 or 2 stage controls which rely on relays or shunt transistors to control the voltage in one or two steps. These essentially just short or disconnect the solar panel when a certain voltage is reached. These are the most basic models. The reliability is very high as they use very few components and chance of failure is very less.

2 or 3 stage and/ or PWM based controller: Quite a few charge controls have a "PWM" mode. PWM stands for Pulse Width Modulation. PWM is often used as one method of float charging. Instead of a steady output from the controller, it sends out a series of short charging pulses to the battery - a very rapid "on-off" switch. The controller constantly checks the state of the battery to determine how fast to send pulses, and how long (wide) the pulses will be. In a fully charged battery with no load, it may just "tick" every few seconds and send a short pulse to the battery. In a discharged battery, the pulses would be very long and almost continuous, or the controller may go into "full on" mode. The controller checks the state of charge on the battery between pulses and adjusts itself each time.

MPPT charge controller: Controller embed with MPPT technology calculates the maximum power voltage (V) at which the PV module delivers maximum power, and then the MPPT operates the module at a level, which extracts the maximum available power. The Solar Charger Controller continuously recalculates the maximum power voltage according to the changing operating conditions.

PWM VS MPPT charge controller:

Pulse width modulation (PWM) and Maximum power point tracking (MPPT). Both adjust charging rates depending on the battery's charge level to allow charging closer to the battery’s maximum capacity as well as monitor battery temperature to prevent overheating.

If maximizing charging capacity were the only factor considered when specifying a solar controller, everyone would use a MPPT controller. But the two technologies are different, each with it’s own advantages. The decision depends on site conditions, system components, size of array and load, and finally the cost for a particular solar power system. 

Factors determining the selection of controllers:

Temperature Conditions
An MPPT controller is better suited for colder conditions. As solar module operating temperatur

goes down, the Vmp  increases. That’s because the voltage of the solar panels operating at their peak power point at Standard Testing Conditions (STC is 25C°) is about 17V while the battery voltage is about 13.5V. The MPPT controller is able to capture the excess module voltage to charge the batteries.  As a result, a MPPT controller in cool conditions can produce up to 20 – 25% more charging than a PWM controller.

In comparison, a PWM controller is unable to capture excess voltage because the pulse width modulation technology charges at the same voltage as the battery.

However, when solar panels are deployed in warm or hot climates, their Vmp decreases, and the peak power point operates at a voltage that is closer to the voltage of a 12V battery. There is no excess voltage to be transferred to the battery making the MPPT controller unnecessary and negating the advantage of an MPPT over a PWM. 

Array to Load Ratio
In a scenario where the solar array is large relative to the power draw from the batteries by the load, the batteries will stay close to a full state of charge. A PWM controller is capable of efficiently maintaining the system without the added expense of an MPPT controller.

Size of the System
Low power systems are better suited to a PWM controller because:

A PWM controller operates at a relatively constant harvesting efficiency regardless of the size of the array

A PWM controller is less expensive that a MPPT, so is a more economical choice for a small system

A MPPT controller is much less efficient in low power applications. Systems 170W or higher will be advantageous if MPPT controller is used.

Type of Solar Module

Stand-alone off-grid solar modules are typically 36-cell modules and are compatible with both PWM and MPPT technologies. Some grid-tie solar modules on the market today are not the traditional 36-cells modules that are used for off-grid power systems. For example, the voltage from a 60-cell 250W panel is too high for 12-Volt battery charging, and too low for 24-Volt battery charging. MPPT technology tracks the maximum power point (thus MPPT) of these less expensive grid-tie modules in order to charge the batteries, whereas PWM does not.

Cost
MPPT controllers are typically more expensive than PWM’s but are more efficient under certain conditions, so they can produce more power with the same number of solar modules than a PWM controller. One must then analyze the site to verify that the MPPT can indeed perform more efficiently when used in that system’s given set of conditions.

When specifying one technology over the other, the cost of the controller becomes less important than the total cost of the system. To specify a controller technology simply based of cost, be sure to perform a close analysis of realized efficiencies, system operation, load and site conditions.

SUMMARY OF COMPARISON:

	PWM Charge Controller	MPPT Charge Controller
Array Voltage	PV array & battery voltages  should match	PV array voltage can be higher than battery voltage
Battery Voltage	Operates at battery voltage so it performs well in warm temperatures and when the battery is almost full	Operates above battery voltage so it is can provide “boost” in cold temperatures and when the battery is low.
System Size	Typically recommended for use in smaller systems where MPPT benefits are minimal	≈ 150W – 200W or higher to take advantage of MPPT benefits
Off-Grid or Grid-Tie	Must use off-grid PV modules typically with Vmp ≈ 17 to 18 Volts for every 12V nominal battery voltage	Enables the use of lower cost/grid-tie PV Modules helping bring down the overall PV system cost
Array Sizing Method	PV array sized in Amps (based on current produced when PV array is operating at battery voltage)	PV array sized in Watts (based on the Controller Max. Charging Current x Battery Voltage)

Important functions of Charge controller:

Blocking Reverse Current:
Photovoltaic panels work by pumping current through your battery in one direction. At night, the panels may pass a bit of current in the reverse direction, causing a slight discharge from the battery. The potential loss is minor, but it is easy to prevent. In most controllers, charge current passes through a semiconductor (a transistor) which acts like a valve to control the current. It allows current to passé only in one direction. It prevents reverse current without any extra effort or cost.

Preventing overcharge:

When a battery reaches full charge, it will no longer store incoming energy. If energy continues to be applied at the full rate, the battery voltage gets too high. There is excessive loss of water, and a chance that the gasses can ignite and cause a small explosion. The battery will also degrade rapidly and may possibly overheat.

Preventing overcharge is done by reducing the flow of energy to the battery when the battery reaches a specific voltage (full rated voltage). When the battery voltage drops due to discharge or an increase in electrical load, the controller again allows the maximum possible charge to the battery. This is called "voltage regulating." It is the most essential function of all charge controllers. The controller "looks at" the voltage and in response regulates the battery charging.

Control Set Points vs. Temperature:
The ideal set points for charge control vary with a battery's temperature. Some controllers have a feature called "temperature compensation." When the controller senses a low battery temperature, it will raise the set points. Otherwise when the battery is cold, it will reduce the charge too soon. If your batteries are exposed to temperature swings greater than about 30° F (17° C), compensation is essential.

Some controllers have a temperature sensor built in. Such a controller must be mounted in a place where the temperature is close to that of the batteries. Better controllers have a remote temperature probe, on a small cable. The probe should be attached directly to a battery in order to report its temperature to the controller.

An alternative to automatic temperature compensation is to manually adjust the set points (if possible) according to the seasons. It may be sufficient to do this only twice a year, in spring and fall.

Control Set Points vs. Battery Type:

The ideal set points for charge controlling depend on the design of the battery. The vast majority of RE systems use deep-cycle lead-acid batteries of either the flooded type or the sealed type. Flooded batteries are filled with liquid. These are the standard, economical deep cycle batteries.

Sealed batteries use saturated pads between the plates. They are also called "valve-regulated" or "absorbed glass mat," or simply "maintenance-free." They need to be regulated to a slightly lower voltage than flooded batteries or they will dry out and be ruined. Some controllers have a means to select the type of battery. One should never use a controller that is not intended for your type of battery.

Eg: Typical set points for 12 V lead-acid batteries at 77° F (25° C)
(These are typical, presented here only for example.)
High limit (flooded battery): 14.4 V
High limit (sealed battery): 14.0 V
Resume full charge: 13.0 V
Low voltage disconnect: 10.8 V
Reconnect: 12.5 V
Temperature compensation for 12V battery:
-.03 V per ° C deviation from standard 25° C

Overload Protection:
A circuit is overloaded when the current flowing in it is higher than its capacity. This can cause overheating and can even be a fire hazard. Overload can be caused by a fault (short circuit) in the wiring, or by a faulty load like a water pump. Some charge controllers have overload protection built in, usually with a push-button reset. Built-in overload protection can be useful, but most systems require additional protection in the form of fuses or circuit breakers.

Displays:

Charge controllers include a variety of possible displays, ranging from a single led light to digital displays of voltage and current. These indicators are important and useful. A display system can indicate the flow of power into and out of the system, the approximate state of charge of your battery, and when various limits are reached.

Important parameters:

Charge Current rating (A): It is the rated charge current of the controller for which the operation is meant.

Battery voltage (V):  It is the voltage of the battery for which the controller is designed.

Maximum PV power (KW): It is the maximum power that the controller can operate perfectly.

Peak efficiency (%): It is the max. efficiency of the controller.

Self consumption: It is the current consumed by the controller in the process of its functioning.

Automatic load disconnect: It is the protective feature includes the disconnection of load in case of low voltage, over discharge (abnormal conditions).

PV open circuit voltage: The maximum voltage that the controller can withstand.

Absorption voltage: It is the range or point of voltage for which the charge of battery is normal.

Float voltage: It is the point of voltage for a given battery rating, the charging process is float (Pulse form).

Charge algorithm:  Type (3/4 stage) of algorithm included in the controller.

Peak current (A): Maximum current that the controller can withstand.

Temperature compensation (mV/^oC): It is the drop of voltage per degree rise of temperature.

Low voltage disconnection (V): It is the set point voltage for which the load gets disconnected.

Low voltage reconnection (V): It is the set point voltage for which the load gets reconnected.

Protection: Protection against over voltage, deep discharge, short circuit faults.

Display and metering: Displays details like voltage level, charge percentage, discharge time etc. Also indicators to indicate faulty conditions like overvoltage, under voltage, short circuit faults.

Equalization:  It attempts to equalize - or make all cells in the battery or battery bank of exactly equal charge.

Essentially it is a period of overcharge, usually in the 15 to 15.5 volt range. If you have some cells in the string lower than others, it will bring them all up to full capacity. In flooded batteries, it also serves the important function of stirring up the liquid in the batteries by causing gas bubbles.

Technical data sheet:

The following links directs to the data sheet of charge controller

http://www.blueskyenergyinc.com/uploads/pdf/SB50-3048Ldatasheet.pdf

https://www.victronenergy.com/upload/documents/Datasheet-Blue-Solar-Charge-Controller-MPPT-75-10,-75-5-&-MPPT-100-15-EN.pdf

Manufacturers:

Name of the company	Address
Sunmatrix Solar Power Systems	#50 | 40feet road( K.T.G College road) | 3rd Cross  Madduramma Layout  | Hegganahalli Cross | Bangalore 560 091 | INDIA. Ph: +91 9740900350 | email: devaraj@sunmatrixsolar.com
Greensol Renewable Power Private Limited	No. 28 A , 2nd Phase, Peenya Industrial Area Bengaluru - 560058 Karnataka, India
Alfa power solution	East krishna nagar, Delhi - 54, India, Mob: +91 9810271172, info@dspsinewaveinverterscardsindia.com
Systellar Innovations	Shankar Chowk,Delhi Road,Meerut - 250002,Uttar Pradesh, INDIA, Contact No: 0121-2400394,E-Mail:info@systellar.in
Kavita solar energy pvt. Ltd.	No. 231, New Defence Colony, Near Railway Station Railway Road, Muradnagar,Ghaziabad - 201206, Uttar Pradesh, India, Call Us:  (+91)-8447556942, Mobile:+(91)-9837261007,+(91)-9012147484
Alpha Impex (solar Division)	R264, TTC, MIDC, Rabale, Navi Mumbai 400701, Maharashtra. India
Protonics Systems India Private Limited	Anil Bhushan (Director) C- 45, Sector- 81, Phase- 2 Noida - 201305, Uttar Pradesh, India
Easy Photovoltech Private Limited	No. 406, Vikasdeep Building, Lakshmi Nagar District Center, Laksmi Nagar,Delhi (India) - 110092,+(91) - 9311112551
Haryana International	206, 2nd Floor, Vardhman Fortune Mall, GT Karnal Road, Near Hans Cinema New Delhi - 110009, Delhi, India
Suntek Energy Systems Private Limited	Sy.No. 240/242, Ground Floor, Chinna Thokatta, New Bowenpally, Main Road, Secunderabad - 500011, Telangana, India.
Pulsar Electronics Private Limited	No. 127/128, Sonal Link Industrial Estate, No. 2, Link Road, Opposite Movie, Time Cinema, Malad West Mumbai - 400064, Maharashtra, India
Rishabh Enterprises	41, A-13, First Floor, Car Market, Opposite Jhilmil Metro, Dilshad Garden Delhi- 110095, India
Leelavati Automation Pvt Ltd	D-11, Block No. 4, Mira Mansion, Third Floor, Sion Circle, Sion West, Near Indra Market Mumbai - 400022, Maharashtra, India
Mainframe Energy Solutions Pvt. Ltd.	1E/5, Ground Floor, Jhandewalan Extension New Delhi - 110055, Delhi, India
Kavita Solar Energy Pvt. Ltd.,	Muradnagar, 231, New Defence Colony, Railway Road Muradnagar - 201206, Uttar Pradesh, India
Ashish Verma	303, Pragati Deep Tower, District Center, Laxmi Nagar Delhi- 110092, India Call Us:   (+91)-8588804251
SIKCO Engineering Services Pvt. Ltd	B-97, Sector-12, Kharghar, Near Shivaji Chowk, Durga Mandir Navi Mumbai - 410210, Maharashtra, India
Rockforest	No. 110, 4th Main, Akshayanagar, St Anns School Road, Begur Hobli, Bengaluru - 560068, Karnataka, India, Call Us: (+91)-8048413186, Mobile: +(91)-9986670254,  +(91)-449038387
Speedex Batteries	No. 4810, Gali Mitra, Roshanara Road New Delhi - 110007, Delhi, India
Green Field Solar Solution Pvt. Ltd	New No. 29, First Main Road, Shenoy Nagar East Chennai - 600030, Tamil Nadu, India
Procorp Enertech Pvt. Ltd.	Shed No. 109/4, Lane 17, Phase 2nd, IDA, Cherlapally, Rangareddy Hyderabad - 500051, Telangana, India
Signet	No. 201/202, Champaklal Industrial Estate, No. 105, Sion East Mumbai - 400022, Maharashtra, India
Eminent Devices & Technologies	No. 6/201, 2nd Floor, North Usman Road, T. Nagar Chennai - 600017, Tamil Nadu, India
Powermax Energies Pvt Ltd	202, Matoshree, Mithagar Road, Mulund East Mumbai - 421201, Maharashtra, India
Senratech	No. 502-A, Golden Complex, Avinashi Road Tiruppur - 641602, Tamil Nadu, India
Hi-tec Power Controls	No. 8, Ground Floor, Surya Complex, Near Swastik Cross Road, C. G. Road, Navrangpura Ahmedabad - 380009, Gujarat, India
Computronix	No. 10, Electronic Plaza, No. 6, P. R. Lane, S. P. Road, 3rd Cross, Ground Floor Bengaluru - 560002, Karnataka, India
Solar Powertech Solutions	TS- 33, SIDCO Industrial Estate, Kurichi, Coimbatore - 641021, Tamil Nadu, India, Call Us: (+91)-8377808381
Prolux Technology	S.N. 75/2/2, Ashok Nagar, Nawale Wasti, Tathawade Pune - 411033, Maharashtra, India
Geie Solar Products India Pvt Ltd	80G, Rajendra Nagar Industrial Area, Sahibabad Ghaziabad - 201007, Uttar Pradesh, India
Shyama Packaging	No. 43, Suvarna Laghu Udyog Yojana, MIDC, Hingna Nagpur - 440016, Maharashtra, India
Airkom Agencies (i) Pvt Ltd	111, Amit Industrial Estate, Dr. S.S. Rao Road, Near Gandhi Hospital, Parel Mumbai - 400012, Maharashtra, India
Urja Unlimited	Plot- 783, Sector- 17 Faridabad - 121002, Haryana, India
Finetech Systems	No. 3/177, Devampalayam, Palangarai, Avinashi TK, Tiruppur District, NH 544, Salem- Coimbatore Highway Tiruppur - 641654, Tamil Nadu, India
Diamond Engineering Enterprises	122-D, Kummalamman Koil Street, Tondiarpet, Near Tondiarpet Market Chennai - 600081, Tamil Nadu, India
Sangam Electronics Co.	No. 8, Parekh Wadi, Opposite Kasa Nagar, Near Bada Ganesh Mandir, Sumul Dairy Road, Katargam G.I.D.C. Old Surat - 395004, Gujarat, India
Saffron Engineering	Plot No. 1, Ashirwad Industrial Society - 2, Opposite Bharat Petrol Pump, 120 Feet Bamroli Road Surat - 395017, Gujarat, India
Crystal Corporation, Akurdi	Jay Ganesh Vision, BR 1, 315, B. Wing, Near Dalvinagar Rail Bridge, Akurdi Pune - 411035, Maharashtra, India
Monarck Electronik Industry	No. 2, Chapru Nagar Square, C. A. Road, Nagpur - 440008, Maharashtra, India
Sun Urja	No. 314 & 315, Krishna Mall, Sector-12, Dwarka New Delhi - 110075, Delhi, India, moblie:   +(91)-9650381148, +(91)-9871409881
Key Operation & Electrocomponents Pvt. Ltd	Plot No. 48, 1st Floor, Street No. 3, Rajasthan Udyog Nagar New Delhi - 110033, Delhi, India
Purevolt Products Private Limited	D- 9/6, Okhla Industrial Area, Phase- 1 New Delhi - 110020, Delhi, India
Ujak Solar Energy & Technology Private Limited	A-205, Sheraton Classic, Dr. Charat Singh Colony, Off Andheri-Kurla Road, Near Old Airtel Gallery, Chakala, Andheri East Mumbai - 400093, Maharashtra, India
Suryodaya Energies	H-2, Textile Colony Industrial Area- A, Opposite OM Dyeing Ludhiana - 141008, Punjab, India
Adithya Solar Energy Systems	No. 209, 1st Floor, Meghana Complex, Opposite Andhra Bank, Balanagar Hyderabad - 500037, Telangana, India
SLM Energy Technologies Pvt. Ltd.	Plot No. 160, Scheme No. 4, Rajendra Nagar Alwar - 301001, Rajasthan, India, Mobile:+(91)9899525616
Surat Exim Private Limited	No. 2030, Jash Textile Market, Ring Road Surat - 395002, Gujarat, India
Usha General Industrial Corporation	J- 2949, Narela Industrial Area Delhi - 110040, India
Decent Plastic Industries	A- 103, Flatted Factory Complex, Jhandewalan New Delhi - 110055, Delhi, India
Orient Traders	F- 55, Okhla Industrial Area, Phase- 1,Delhi- 110020, India
Zillion Enterprises	Plot No. 50, Door No. 111, Taluk Office Road, Venkatapuram, Saidapet,Chennai - 600015, Tamil Nadu, India, Mobile:  +(91)-9840072834, +(91)-9841072834
KS Plastic Group	F-33, Okhla Industrial Area, Phase-1 New Delhi - 110020, Delhi, India
Jai Sunlight Systems	No. A6, Mullai Nagar, Damodar Swamy Layout, Neelikonampalayam Post Coimbatore - 641033, Tamil Nadu, India
Electrical Consultants & Engineers	319-320, 1st Floor, Shivaji Commercial Complex, Ravi Nagar Square, Amravati - 444605, Maharashtra, India, Mobile:  +(91)-9225700821, +(91)-9225700238
Ultron Electronics	Plot No. 1-9-423/22, Opposite Road To Mandala Laxmamma Garden Function Hall, Parimala Nagar, ECIL Post, Hyderabad - 500062, Mobile: +(91)-8377800736 Telangana, India
Raman Power Solutions Pvt Ltd	16-2-227/190, Sardharpatel Nagar, Opposite Nizampet Cross Road, Kukatpally Hyderabad - 500072, Telangana, India
Tapashwi Power Controls	Plot No. 32, Prashanthi Nagar, Kapra, ECIL Post Hyderabad - 500062, Telangana, India
Sanvi Electronics	Plot No. 16, 1-9-323/16/1B, Hanuman Nagar, Kushaiguda, Hyderabad - 500062, Telangana, India, Call Us:  (+91)-8048022275, Mobile: +(91)-8978900919, +(91)-9494439050
Asthra Projects	LIG- B, 329, HMTV Road, Dr. A. S. Rao Nagar, ECIL Post, Hyderabad - 500062, Telangana, India,  +(91)-8008822555, +(91)-8686363068
V2 solar	No. 7-4-97, Opposite BBR Hospital, Above Andhra Bank ATM, Balanagar, Hyderabad - 500011, Telangana, India, Call Us: (+91)-8048429698, Mobile: +(91)-9848754313, +(91)-01000155
Universal Mega Solar Private Limited	No. 8-2-270/1, 2nd Floor, Banjara Hills, Road No. 2, Opposite Brand Factory , Hyderabad - 500034, Telangana, India, Call Us: (+91)-9643203341, Mobile: +(91)-9848199369, +(91)-9032702727
Sree Vaishnavi Solar Energy Systems	H.No. 155, 1st Floor, Netaji Nagar, 'X' Roads, HI-Tension Road, Kapra, Hyderabad - 500062, Telangana, India,Call Us: (+91)-8048557383, Mobile: +(91)-9912760934, +(91)-95269991
Solar Idea Pvt. Ltd.	No. 8-2-277/A/7, Plot No. 126, Road No. 2, Banjara Hills, Hyderabad - 500034, Telangana, India, Call Us: (+91)-8048083199, Mobile: +(91)-7032660066, +(91)-9866987719, Telephone:+(91)-(40)-49464332

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